<?php
    $year =2015;
    $result=(($year%4==0)&&($year&100!=0)||($year%400==0))?"是闰年":"不是闰年";
    echo"<h2>瑞年的判断</h2>";
    echo"<p>输入的年份:".$year;
    echo"<p>判断的结果:".$year.'年'.$result;